If you think she only did it for the money, you haven't even 'scratched the surface'. [=there are many other factors, reasons, etc., involved]
Despite the 'surface' differences between the two candidates, they are very similar in most ways.
The tension between them is beginning to 'rise to the surface'. [=it is becoming easy to see]
(..) Sip, Ryan. Houston, in the blind, we have a visual of the ISS. The station must have been evacuated because the first Soyuz is missing. The second Soyuz exhibits surface damage, and its chute has been deployed. Any use as an escape pod for re-entry is impossible. Shouldn't we be turning? (..)2013 Gravity